<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>

        <el-card>
            <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>

            <!-- 进度条 -->
            <el-steps :space="200" :active="activeIdx - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>


            <!-- tab区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top"
                size="small">
                <el-tabs v-model="activeIdx" tab-position="left" :before-leave="beforeTabLeave" @tab-click="tabClick">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name" placeholder="请输入商品名称"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" onkeyup="value=value.replace(/[^\d.]/g,'')">
                            </el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number" type="number">
                            <el-input v-model="addForm.goods_number"></el-input>
                        </el-form-item>

                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="cateProps"
                                @change="handleChange" clearable></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">

                        <el-form-item :label="item.attr_name" v-for="(item,i) in manyTableData" :key="item.attr_id">
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="checkItem" v-for="(checkItem,i) in item.attr_vals" :key="i" border>
                                </el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in  onlyTableData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-form-item>
                            <el-upload :action="uploadUrl" :on-preview="handlePreview" :on-remove="handleRemove"
                                list-type="picture" :headers="headersOjb" :on-success="onUploadSuccess">
                                <el-button size="small" type="primary">点击上传</el-button>
                                <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                            </el-upload>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">

                        <quill-editor v-model="addForm.goods_introduce" />

                        <el-button type="primary" size="mediumn" class="btn-add" @click="onAdd">添加</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>

        </el-card>
        <el-dialog title="图片预览" :visible.sync="previewDialogVisible" width="50%">
            <img :src="previewPath" alt="" class="preview_img">
        </el-dialog>
    </div>
</template>

<script>
    import _ from 'lodash'
    export default {
        data() {
            return {
                activeIdx: 0,
                addForm: {
                    goods_name: '',
                    goods_cat: [],
                    goods_price: 0,
                    goods_number: 0,
                    goods_weight: '',
                    goods_introduce: '',
                    pics: [],
                    attrs: '',
                    //商品详情描述
                    goods_introduce: '',
                    attrs: []
                },
                addFormRules: {
                    goods_name: [
                        { required: true, message: '请输入商品名称', trigger: 'blur' },
                        { min: 2, max: 15, message: '长度在 2 到 15 个字符', trigger: 'blur' }
                    ],
                    goods_price: [
                        { required: true, message: '请输入商品价格', trigger: 'blur' }
                    ],
                    goods_weight: [
                        { required: true, message: '请输入商品重量', trigger: 'blur' }
                    ],
                    goods_number: [
                        { required: true, message: '请输入商品数量', trigger: 'blur' }
                    ],
                    goods_cat: [
                        { required: true, message: '请选择商品分类', trigger: 'blur' }

                    ]

                },
                cateList: [],
                cateProps: {
                    expandTrigger: 'hover',
                    label: 'cat_name',
                    value: 'cat_id',
                    children: 'children'
                },
                manyTableData: [],
                onlyTableData: [],
                uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
                headersOjb: {
                    Authorization: window.sessionStorage.getItem('token')
                },
                previewPath: '',
                previewDialogVisible: false

            }
        },
        created() {
            this.getCateList()
        },
        methods: {
            async getCateList() {
                const { data: res } = await this.$http.get('categories')
                if (res.meta.status !== 200) return this.$message.error('获取数据失败')
                this.cateList = res.data
            },
            handleChange() {

            },

            //tab切换
            beforeTabLeave(active, oldActive) {
                if (oldActive === '0' && this.addForm.goods_cat.length !== 3) {
                    this.$message.error('请选择商品分类')
                    return false
                }

            },
            async tabClick() {
                if (this.activeIdx === '1') {
                    const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/`, { params: { sel: 'many' } })
                    if (res.meta.status !== 200) return this.$message.error('获取动态参数失败')
                    res.data.forEach(item => {
                        item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
                    })
                    this.manyTableData = res.data
                } else if (this.activeIdx === '2') {
                    const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/`, { params: { sel: 'only' } })
                    if (res.meta.status !== 200) return this.$message.error('获取商品属性失败')
                    this.onlyTableData = res.data
                }
            },

            //图片处理
            handlePreview(file) {
                console.log(file);
                this.previewPath = file.response.data.url
                this.previewDialogVisible = true
            },
            handleRemove(file, fileList) {
                const filePath = file.response.data.tmp_path
                const idx = this.addForm.pics.findIndex(item => item.pic === filePath)
                this.addForm.pics.splice(idx, 1)
            },
            onUploadSuccess(response) {
                if (response.meta.status !== 200) return this.$message.error('上传失败')
                const picInfo = { pic: response.data.tmp_path }
                this.addForm.pics.push(picInfo)
            },
            onAdd() {
                this.$refs.addFormRef.validate(async vd => {
                    if (!vd) return this.$message.error('请填写必要表单项目')
                    //this.addForm.goods_cat 被级联 绑定数组，改变类型会报错，故这里拷贝一个
                    const form = _.cloneDeep(this.addForm)
                    form.goods_cat = this.addForm.goods_cat.join(',')

                    this.manyTableData.forEach(item => {
                        const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
                        this.addForm.attrs.push(newInfo)
                    })

                    this.onlyTableData.forEach(item => {
                        const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
                        this.addForm.attrs.push(newInfo)
                    })
                    form.attrs = this.addForm.attrs

                    console.log(form);
                    const { data: res } = await this.$http.post('goods', form)
                    if (res.meta.status !== 201) return this.$message.error('添加商品失败')
                    this.$message.success('添加商品成功')
                    this.$router.push('/goods')
                })
            }
        },
        computed: {
            cateId() {
                return this.addForm.goods_cat.length === 3 ? this.addForm.goods_cat[2] : null
            }
        },
    }
</script>

<style lang="less" scoped>
    .el-checkbox {
        margin: 0 10px 0 0 !important;
    }

    .preview_img {
        width: 100%;
    }

    .btn-add {
        margin-top: 15px;
    }
</style>